Rechercher dans le manuel MySQL
Search Results
https://dev.mysql.com/window-function-descriptions.html
LAG() (and the similar LEAD() function) are often used to compute differences between rows. The last row shows the same thing when there is no next row for LEAD(). LAG() and LEAD() also serve to compute sums rather than differences. LEAD(expr [, N[, ... This section describes nonaggregate window functions that, for each row from a query, perform a calculation using rows related to that ...
https://dev.mysql.com/server-error-reference.html
Error number: 1557; Symbol: ER_FOREIGN_DUPLICATE_KEY_OLD_UNUSED; SQLSTATE: 23000 Message: Upholding foreign key constraints for table '%s', entry '%s', key %d would lead to a duplicate entry Error number: 1558; Symbol: ... The MySQL server writes ...
https://dev.mysql.com/fulltext-boolean.html
InnoDB full-text search does not support the use of a leading plus sign with wildcard ('+*'), a plus and minus sign combination ('+-'), or leading a plus and minus sign combination ('+-apple'). The boolean full-text search capability supports the ...
https://dev.mysql.com/string-functions.html
mysql> SELECT LPAD('hi',4,'??'); -> '??hi' mysql> SELECT LPAD('hi',1,'??'); -> 'h' LTRIM(str) Returns the string str with leading space characters removed. TRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str), TRIM([remstr FROM] str) Returns the ...
https://dev.mysql.com/server-system-variables.html
With statement-based binary logging, having different modes for the master and slaves might lead to replication errors. If a tag value of tag is specified, it is appended to the server identifier with a leading hyphen, resulting in a syslog ... The ...
https://dev.mysql.com/optimizer-hints.html
If the hint includes no leading @query_block_name, the hint applies to the query block in which it occurs. If the hint includes no leading @query_block_name, the hint applies to the query block in which it occurs. If the hint includes no leading ...
https://dev.mysql.com/mysql-cluster-ndbd-definition.html
DataMemory can be changed, but decreasing it can be risky; doing so can easily lead to a node or even an entire NDB Cluster that is unable to restart due to there being insufficient memory space. Because full parallelism in such cases can lead to ...
https://dev.mysql.com/replication-options-slave.html
You can use the --relay-log option to specify an alternative location, by adding a leading absolute path name to the base name to specify a different directory. You can use the --relay-log-index option to specify an alternative location, by adding a ... This section explains the server options and system variables that apply to slave replication servers and contains the following: Startup Options for Replication Slaves Options for Logging Slave Status to Tables System Variables Used on Replication Slaves Specify the options either on the command line or in an option ...
https://dev.mysql.com/func-op-summary-ref.html
GTID_SUBTRACT() Return all GTIDs in set that are not in subset. JSON_CONTAINS() Whether JSON document contains specific object at path JSON_CONTAINS_PATH() Whether JSON document contains any data at path JSON_DEPTH() Maximum depth of JSON document ...
https://dev.mysql.com/partitioning-limitations.html
Therefore, a change in the SQL mode at any time after the creation of partitioned tables may lead to major changes in the behavior of such tables, and could easily lead to corruption or loss of data. In some cases, using large numbers (hundreds) of ... This section discusses current restrictions and limitations on MySQL partitioning ...
Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-fct-leading-p-1.html
The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.
References
These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.
